Improvement in ejectors



J. H. IRWIN.

Ejector.

No. 217,109. Patented July 1, I879.

UNITED STATES PATENT OFFICE.

JOHN H. IRWIN, OF PHILADELPHIA, PENNSYLVANIA.

IM PROVEM ENT IN EJ ECTORS.

Specification forming part of Letters Patent No. 217,109, dated July 1, 1 879 application filed August 21, 1878.

- reference being had to the accompanying drawing, which is a longitudinal section, showing the lower part of the steam-cone, the combining-cone, and receiving-cone.

This invention relates to that class of instruments known as injectors, and its structure has special reference to the operation of raising air or water and discharging it from a reservoir, the general principles of operation being the same whatever may be the source or destination of the fluid under treatment.

In this invention the chief features are the relative form and proportion of the steam combining and receiving cones, which have been found after a long series of experiments to be most effective in results.

ln my patents dated May 6, 1879, and May 27, 1879, I have shown that the proper inclination of the steam-cone A is forty-five degrees, and that the steam-jet opening should be cylindrical, and of length and diameter equal. The combining-cone B in this inven tion is in length four times its smaller diameter, and the larger diameter is also four times the smaller diameter. The receiving-cone O at its smaller diameter is equal to the smaller diameter of the combining-cone, its larger diameter twice the smaller diameter, and its length sixteen times the smaller diameter. These relative proportions are the same as expressed and explained in my patents aforesaid; but for the purpose of an ejector this device differs from the injector described in said patents in the following particulars: In said patents the diameter of the steam-jet opening a in the steam-cone is twice the smaller diameter of the combining-cone, or as 2 to 1. In this device the most efficient steam-jet open- 'in g is one-half the smaller diameter of the com- Steam enters the with a nose, f, smaller in diameter than the steam-jet opening a, and projecting through the same when the spindle is closed upon the cone. Said nose is perforated axially, and its front en dis contracted, the inner and outer faces being inclined at an angle of forty-five degrees to the axis. The diameter of the central orifice is equal to its length, which equals one-fourth the diameter of the steam-jet opening. The nose f is in length equal to the length of the steam-jet opening 'a.

In starting this implement the spindle F is pushed forward against the steam-cone, and steam is turned on. The jet of steam then issues from the spindle-opening in nose f, and the air is thereby expelled from the combining and receiving cones and the fluid to be ejected is immediately drawn in and moved forward with velocity approximating the velocity of the steam-jet. When the current is thus es-, tablished more steam may be admitted, and the spindle F is drawn back gradually and an annular j et of steam admitted around the nose f to re enforce the spindlejet which loses power as the spindle is retracted, and may finally replace it entirely.

The spindle H, whereby spindle F is actuated, is provided with a screw-thread near its outer end and a hand wheel or crank whereby it may be turned.

This apparatus may be economically used for raising or propelling water, for propelling air for all the various purposes of ventilation, blasts, pneumatic purposes, 850.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an injector, a steam-cone having its face inclined to its axis at an angle of fortyfive degrees, or thereabout, and having a cylindrical jet-opening whose length and diameter are equal, in combination with a combining-cone, the smaller internal diameter whereof is equal to twice the diameter of said jetopening, and its axial length and larger diam eter each equal to four times its smaller diameter.

face inclined to its axis at an angle of fortyfive degrees, or thereabout, and having a cylindrical jet;opening whose length and diame- I opening, as set forth. 2. In an injector, a steam-cone having its ter are equal, and acombiningcone, the smaller internaldiameter whereof is equal to twice the diameter of said jet-opening, and its axial length and larger diameter each equal to four J. H. IRWIN. Witnesses:

R. D. 0. SMITH, CHAS. F. R. HEUGKEROTH. 

